diff --git a/src/ast.rs b/src/ast.rs
index d923f10..48374c4 100644
--- a/src/ast.rs
+++ b/src/ast.rs
@@ -299,7 +299,7 @@ mod tests {
             range_hint: "",
             lines: vec![],
         };
-        for (input, expected) in vec![
+        for (input, expected) in [
             ("", None),
             (" ", None),
             ("  ", None),